---
title: "CVE-2026-45829: ChromaDB Python project has a pre-authentication code injection vulnerability"
url: https://erroneo.us/security/cve/CVE-2026-45829/
description: "CVE-2026-45829 (chromadb (PyPI)): A pre-authentication, code injection vulnerability in version 1.0.0 or later of the ChromaDB Python project allows an…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-05-18
date_modified: 2026-10-05
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-45829"
kev: false
cvss: 10
epss: 0.01411
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-45829: ChromaDB Python project has a pre-authentication code injection vulnerability

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 1.4% , percentile 72: FIRST’s model estimates a 1.4% chance of exploitation activity in the next 30 days, higher than 72% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes chromadb (PyPI) >= 1.0.0, <= 1.5.9, no fixed version listed . Check your lockfile, including transitive dependencies.

## What it is

A pre-authentication, code injection vulnerability in version 1.0.0 or later of the ChromaDB Python project allows an unauthenticated attacker to run arbitrary code on the server by sending a malicious model repository and trustremotecode set to true in the /api/v2/tenants/{tenant}/databases/{db}/collections endpoint.

## Affected packages

- PyPI `chromadb` >= 1.0.0, <= 1.5.9 → fixed: none listed

## Affected products (CVE record)

- Chroma ChromaDB: 1.0.0 <= *

## Severity

- HiddenLayer CVSS 4.0: 10 `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`
- redhat-SADP CVSS 3.1: 10 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`
- GitHub CVSS 4.0: 9.3 `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 1.41% probability of exploitation activity in the next 30 days; percentile 72.

## Sources

- [GitHub Advisory GHSA-f4j7-r4q5-qw2c](https://github.com/advisories/GHSA-f4j7-r4q5-qw2c)
- [CVE.org record CVE-2026-45829](https://www.cve.org/CVERecord?id=CVE-2026-45829)
- [NVD entry CVE-2026-45829](https://nvd.nist.gov/vuln/detail/CVE-2026-45829)
- [hiddenlayer.com](https://www.hiddenlayer.com/research/chromatoast-served-pre-auth)
- [github.com](https://github.com/chroma-core/chroma/issues/6717)
- [access.redhat.com](https://access.redhat.com/security/cve/CVE-2026-45829)
- [RHBZ#2479623](https://bugzilla.redhat.com/show_bug.cgi?id=2479623)
- [security.access.redhat.com](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45829.json)
- [github.com](https://github.com/chroma-core/chroma)
- [github.com](https://github.com/pypa/advisory-database/tree/main/vulns/chromadb/PYSEC-2026-311.yaml)
- [pypi.org](https://pypi.org/project/chromadb)

---
Source page: https://erroneo.us/security/cve/CVE-2026-45829/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt